设表达式以字符形式已存入数组E[n]中，‘#’为表达式的结束

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int EXYX(char E[n])
    { int i=0; char c;
     inistack(s);
     while (E[i]!='#')
      {if(E[i]=='(') push(s,E[i]);
       if(E[i]==')') if (stackempty(s)) return(0);
                else c=pop(s);
       i++;
       }
     if (stackempty(s)) return(1);else return(0);
    }